public class Base {
    public int a=1;
    public void testA(){
        System.out.println("testA().........");
    }
}
class Derived extends Base{
    public int b=2;
    public void testA(char a){
        System.out.println("testA(char).......");
    }
    public void test(){
        testA();
        testA('a');
    }

    public static void main1(String[] args) {
        Derived derived=new Derived();
        derived.test();
    }
}
